For now, I’m going to go with the solution below, which is to use an
older revision of Guix (one where ‘open-inferior’ was using
‘open-pipe*’) as the dependency of the ‘cuirass’ package.

I’m running “cuirass evaluate” manually on berlin to make sure it
actually works.  If everything goes well, I’ll push it and reconfigure
berlin later today or tomorrow.

Ludo’.